Closure cap



p c. J. TERRlLL 2,014,093

CLOSURE CAP Filed' Feb. 25, 1950 UNITED STATES" PATENT OFFICE CLOSURECAP Clair J. Terrill, Dayton, Ohio, assignor to The Kurz-Kasch Company,Dayton, Ohio, a corporation of Ohio Application February 25, 1930,Serial No. 431,127

3 Claims.

This invention relates to receptacle closures and more particularly to aduo-ty both slip and screw threaded receptacle.

pe cap adapted for engagement with a The purpose of the invention is toprovide in a single closure cap both slip and positive engagementfeatures, which will be neat in appearance,

simple in construction, easily applied and detached, adapted to form atight joint, and unlikely to get out of repair.

It is desirable that bottles and other containers employed for toiletpreparations, chemicals, pharmaceutical preparations, and the like, beprovided with an easily removable closure cap when frequently used, andyet equally desirable that the closure cap be locked or positivelyengaged with the receptacle for storage or shipment or when used only atlong intervals.

The present invention provides a single closure cap which may be used atwill either as a temporary closure slidingly engageable with thereceptacle or employed as a more permanent closure by screw-locking itin engagement with the receptacle. The present closure cap, which ispreferably, though not necessarily, molded from phenolic condensation orother plastic molding material, is provided with a counterbore formingan interior shoulder beyond which the bore is screw threaded forengagement with a threaded terminal extension upon the receptacle whilethe outer portion of the bore of larger diameter is unthreaded' and isof greater axial extent than the threaded portion whereby it is enabledto have a slip fit engagement withan enlarged portion of the receptaclebeyond terminal prior to the with the smaller threaded portion the screwthreaded engagement of such terminal of the bore.

In the event that it is desired to interlock the closure cap with thereceptacle, it is merely necessary to rotate the cap thus effectinginterengagement of the respective threaded portions of the cap andreceptacle. interior wall or skirt of the To insure a tight slip fit,the

cap is slightly deformed from true circle formation, thus necessitatinga slight distortion of the wall of the cap in its engagement with thecorresponding portion of the receptacle.

With the above primary and other incidental objects in view as will morespecification, the invention 0 tures of construction,

fully appear in the onsists of the feathe parts and combinain theclaims.

Referring to the accompanying drawing wherein is shown the preferred butobviously not necessarily the only form of embodiment of the invention,Fig. 1 is a sectional view of a closure cap embodying the presentinvention, applied to a receptacle with which it is interlocked by the 5screw threaded engagement of the receptacle terminal within the innerend of the counterbore of. the cap.

Fig. 2 is a similar view of thecap in its temporary or slip engagementrelation with the recep- 10 tac e.

Fig. 3 is an enlarged detail sectional view of the closure cap formingthe subject matter hereof.

Fig. 4 is a greatly exaggerated bottom plan view of the cap illustratingdiagrammatically its re- 15 is counterbored to form a shoulder ortransverse annular seat 5. Beyond this shoulder or seat 5, the smallerportion of the interior bore is screw threaded as at B for engagementwith the screw threaded terminal extension 3 of the receptacle. Theouter and larger portion 1 of the bore of the cap 4 approximately agreesin diameter with that of the head portion 2 of the receptacle and is ofgreater axial extent than such screw threaded terminal extension 3 ofthe receptacle whereby the larger portion 1 of the cap will extend intooverlapping relation with the cylindrical head 2 prior to the engagementof the threaded extension 3 within the inner threaded bore 6 of the cap.Such relation of the cap and receptacle is illustrated in Fig. 2. Thedependent side walls or skirt of the cap 4 has sliding or slip fit uponthe cylindrical head 2, enabling the cap to be easily and quicklyapplied and removed from the receptacle for temporary closure thereof.When it is desired to permanently close the receptacle, either forshipment or for storage or when it is to be undisturbed for aconsiderable period of time, the cap is positively engaged with thereceptacle by rotation whereby the threaded terminal extension 3 isprojected within the interior threaded bore 6 of the cap. In thisadjustment the shoulder or seat '5 is brought into bearingcontact withthe upper face of the cylindrical head 2 thus making a sealing contactas is illustrated in Fig. 1. To insure a tight sealing contact, theshoulder 5 may be grooved or recessed as indicated at 8 in Fig. 3 toreceive a sealing gasket 9 of rubber or other yielding sealing material.As a further precaution against leakage, a second sealing gasket It) maybe seated within the inner end of the screw threaded portion 8 of thebore of the cap, which gasket l0 in the final adjustment of the capmakes sealing contact with the terminal end of the screw threadedextension 3. While in some cases both of these sealing gaskets 9 and inmay be found desirable, for ordinary use one or the other may beomitted.

Ordinarily the dependent side walls of the cap are of circular contouragreeing with the contour of the head 2. This permits the cap to engagesuch head with an axial sliding movement when the cap is to be onlytemporarily applied, as in Fig. 2, and also to engage the head 2 withrotary movement when the screw threaded portions of the cap andreceptacle are to be interengaged as in Fig. 1. However to insure atight gripping slip engagement of the cap with the cylindrical head 2,the wall of the cap may be slightly distorted out of a true circularform thus requiring a slight deformation of the cap in its applicationto the head 2 of the receptacle. A cap molded from phenolic condensationor other commercial plastic molding material will possess suflflcientresiliency to permit the necessary distortion.

In the exaggerated end view Fig. 4, the side wall of the cap is shown ascomprising a series of alternating arcuate and fiat faces. The arcuateportions II are of slightly' greater radius than that of the cylindricalhead 2 which is indicated by the dot and dash line l2 in Fig. 4. Theintermediate fiat faces l3 are radially spaced slightly lessthan theradius of the cylindrical head 2. This necessitates a distention of thecap at points coincident with the flat faces l3, which distention iscompensated for by a slight inward distortion of the arcuate faces H.Thus the cap is under tension at all times while engaged with thecylindrical head 2. The outward distention of the cap coincident withthe fiat faces l3 and inward distortion of the wall coincident with thearcuate faces II causes the cap to conform throughout substantially itsentire circle with the contour of the head 2. The gripping pressure thusafforded is sufficient to prevent accidental displacement of the cap,but is not sufiicient to cause any difficulty in removing or replacingthe cap upon the receptacle.

Obviously the disposition of the male and female threaded portions maybe reversed with the male portion interiorly of the cap and the femaleportion within the neck of the receptacle without departing from thespirit of the invention. Such mere reversal being so apparent andobvious is deemed not to necessitate illustration.

From the above description it will be apparent that there is thusprovided a device of the character described possessing the particularfeatures of advantage before enumerated as desirable, but whichobviously is susceptible of modification in its form, proportions,detail construction and arrangement of parts without departing from theprinciple involved or sacrificing any of its advantages.

While in order to comply with the statute the invention has beendescribed in language more or less specific as to structural features,it is to be understood that the invention is not limited to the specificdetails shown, but that the means and construction herein disclosedcomprise the preferred form of several modes of putting the inventioninto effect and the invention is, therefore, claimed in any of its formsor modifications within the legitimate and valid scope of the appendedclaims.

Having thus described my invention, I claim:

1. The combination with a receptacle including a threaded extremity anda contiguous unthreaded portion of greater diameter, of a closure caphaving threaded and frictional slip engagement with the receptacle, saidcap being formed from resilient material and having therein acounterbored recess, the inner portion of which is screw threaded. theouter portion of which is unthreaded and of greater axial extent thanthe threaded portion, and of non-circular contour.

2. A closure for use with a container having 'a threaded extremity and acontiguous unthreaded portion of greater diameter, comprising africtional slip cap for the container having-therein a counterboredrecess, the inner smaller portion of which is internally screw threaded,the outer portion of which is unthreaded and of greater axial extentthan the threaded portion and adapted for slip engagement with acontainer throughout its path, and relatively spaced flat frictionalsurfaces within the outer portion of the recess, engageable with theunthreaded portion of the container, and a sealing gasket seated in theinner end of the threaded portion.

3. The combination witha receptacle including a threaded extremity and acontiguous unthreaded portion of greater diameter, of a closure cap forthe receptacle formed from resilient material and having a plurality ofarcuate interior faces arranged in circular sequence and intermediatefiat faces extended inwardly beyond the circular line of the arcuatefaces for sliding frictional engagement with a substantially circularportion of the receptacle, the diameter of which is slightly greaterthan that of the cap between said fiat faces, thus necessitatingdistortion of the cap, the cap having a smaller screw threaded portionat its inner end to engage the threads of the extremity of thereceptacle.

CLAIR J. 'IERRILL.

